We divide 458209 by 20
We want to divide 458209 by 20.

Moving on to step 1:
20 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 20

Going ahead to step 2:
20 goes into 45 2 times with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 40 from 45 leaves us with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 20

Advancing to step 3:
When dividing 58 by 20, we get 2 with a remainder of 18.
The next digit of our result is 2. 
Result so far: 22.0
If we subtract 40 from 58, we get 18.
Grab the next digit (2) from the dividend, add it to 18, then carry on: 182 / 20

Going ahead to step 4:
182 divided by 20 is 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 229.0
Subtract 180 from 182 to get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 20

Going ahead to step 5:
20 goes into 20 1 times with a remainder of 0.
The next digit of our result is 1. 
Result so far: 2291.0
The remainder is 0 after subtracting 20 from 20.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 20

Let's proceed to step 6:
The number 20 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 22910.0
Deduct 0 from 9 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
20 goes into 90 4 times with a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 22910.4
The remainder is 10 after subtracting 80 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
When dividing 100 by 20, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 22910.45
Subtract 100 from 100 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
20 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 22910.45
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 22910.45
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 22910.45, with a leftover of 0.0.